Late results after operations for left ventricular outflow tract obstruction

Area of Science:

• Cardiology
• Pediatric Surgery
• Cardiac Surgery

Background:

• Left ventricular outflow tract obstruction (LVOTO) is a critical condition in young patients.
• Surgical interventions aim to relieve this obstruction, but long-term outcomes require thorough evaluation.

Purpose of the Study:

• To assess the late results of surgical relief for LVOTO in pediatric patients (1-18 years old).
• To evaluate operative mortality, survival rates, and the incidence of adverse postoperative events.

Main Methods:

• A retrospective analysis of patients from the National Heart Institute and recently reported studies.
• Inclusion criteria: age 1-18 years, minimum 5-year follow-up.
• Data collected on operative mortality, early and late postoperative gradients, survival rates, and adverse events.

Main Results:

• Low operative mortality rates across different types of aortic stenosis (valvular, subvalvular, hypertrophic).
• Significant reduction in postoperative gradients and high late survival rates observed.
• Actuarial analysis predicts a substantial proportion of patients may experience adverse events within 10 years.
• 54-78% of patients achieved satisfactory late results, with major hemodynamic abnormalities found in 55% of unsatisfactory cases within 1 year.

Conclusions:

• Surgical interventions for pediatric LVOTO provide initial relief but are often palliative.
• Long-term follow-up is crucial for early detection of residual obstruction, regurgitation, or other complications.
• Continuous monitoring throughout childhood, adolescence, and adulthood is recommended for optimal patient management.